v2.6.1 Push the Botton

• Moved the inverter_{INVERTER_ID}_maxpwr entity to the device overview of the inverter as suggested by @c0mplex1
• Changed the reboot switch entity for a button entity as suggested by @TexTown and @ddaddy
• Changed the readme text to match the new button entity

If you've added the switch entity to the dashboard, it is missing after HA restart and you need to add the button entity instead
You also might want to remove the old reboot switch entity manually from the entity list.

Thanks for discussions, suggestions and participation